Forging machine



G. F. MILLS FORGING MACHINE 'May 27, 1930.

Filed 001;. 5, 1925 798 FMZ'ZZX by/%' A? orrwy.

Patented May 27, 1930 UNITED STATES GEORGE E. MILLS, or MICHIGAN CITY, INDIANA, n ssrenon TO SULLIVAN MACHINERY PATENT oFFics COMPANY, A. CORPORATION OF MASSACHUSETTS FORGING MACHINE Application filed. October 5, 1925. Serial No. 60,586.

In making cutter-bits, the bit is forged while hot and it is desirable to utilize the heat in the bit. for tempering the same, thereby doing away with the necessity of reheating the bit. To accomplish this, one diificulty encountered, among others, is that the bit portion is cooled below a suitable temperature for tempering by coming into contact with relatively cold forging dies, this cooling being even more pronounced due to the bit portion being usually tapered and much thinner than the shank. However, the heat in the body or shank portion of the bit is sufiicient for tempering purposes if 'sufiicient time is allowed after the forging operationto permit the heat in the shank to be distributed to the cooled bit portion, thereby raising its temperature to a suitable tempering heat. The problem is then, broadly speaking, one of providing means whereby the bit may be controlled for a suitable length of time after forging to allow heat distribution. A further problem involved is to provide means whereby during this heat distribution period another blank may be forged, thereby increasing the output of the machine.

The objects of my invention are accordingly to provide suitable structure for attaining the above results although the structure involved is of course inherently capable of performing functions other than those related to the above problems. A more specific object of the invention is to control the bit by some working element ofthc forging machine so that there is an automatic relation between bit control and the operation of the machine. In the specific embodiment of the invention I have also provided mechanisms whereby the cutter bits may be fed during a forging operation and initially and finally discharged by the use of suitable coordinating means between said mechanisms. Thusit is made possible by these mechanisms toinsert a bit blank in the machine, feed thesame during forging, initially discharge the bit from the range of the forging dies, control movement of'the bit during heat distribution, allow insertion of another hit blank in the machine and forging thereof, and then after the heat in the first bit has been distributed to the cooled bitv portion to finally discharge the same.

VJhile I have herein specifically coordinated three mechanisms, it will of course be under-- stood that certain of these mechanisms could be omitted or other mechanisms-could be' My invention is illustrated as-bein-g em-- bodied in a forging machine of the type dis closed in the patents of one -I-Iarry C. Johan- I sen, Pat. No. 1,604,414, and one Joseph Lesicko, Ser. No. 23,946, the machine herein disclosed having in addition to my improved structure all the structural characteristics of the machines in said patents. Briefly described, the forging machine comprises 'a frame 1 having a reciprocatingcrosshead 2 driven from a suitable flywheel 3, connection of which to the crosshead being controlled by a suitable clutch mechanism 4. The crosshead carries a roller die 5 having a peripheral groove therein adapted to overrun a fixed raised die 6, the transverse configuration of which is substantially the same as the bit portion of a cutter bit 7. As the roller 5 is reciprocated, the bit is fed upwardly by a longitudinally movable member 8 having an inclined cam surface 9' engaging the lower end of the'bit. engaged by'a segmental gear 11 which is fixed to a rockshaft. 12. This shaft extends beyond each side of the frame where it carries a hand lever 13 and a final bit discharging mechanism 1 4 which herein specifically has a depending arm 15" carrying a widebit engaging member 16 and an upwardly extending leverarm-17l A rack 10 on the n1'ember8'is The mechanism for initially discharging the bits from forging position comprises as disclosed in the Johansen patent a. laterally movable member 18 having an open sided slot 19 to receive the bit 7. A rod 20 extends laterally from the member 18 While a spring 21 surrounding said rod tends normally to move the bit support 18 to its forginv position. In order to efiect discharge of a bit through an opening 22 and on to a chute 23 the shaft 20 carries a transverse pin 24 to be engaged by, the bifurcated arm 25 of a bell crank 26'which is pivotally mounted in a suitable adjustable bracket- 27 carried on the side of the frame 1. The arm 28 of the bell crank is engaged by the lever 17- when the hand lever 13 is moved away from the operator. (It will be noted that moving the hand lever toward the operator causes upward feeding of the blank. Upon engagement of the lever 17 and arm 28 the bit support 18 will be moved'laterally by engagement of the pin 2-1 and arm 25, the bit being discharged throughthe opening 22 and on to the chute to finally fall upon a platform 29 disposed below the bit controlling means 14.

This platform comprises a series of vertlcally spaced horizontal surfaces 30, 31, and 32, the first two of which are joined by a vertical shoulder 30 slightly less than the thickness of a bit blank 7 while the last two surfaces are oined by an inclined surface 31 Inoperation the laterally movable bit support 18 will be normally held by the spring 20 in forging relation to the dies 5 and 6 so that a bit blank may be inserted within the recess 19 to abut the inclined feeding cam surface 9. Upon reciprocationof the forging roller 5 the operator will gradually pull the hand lever 13 forward to cause feeding of the bit upwardly to the dies. l/Vhen the forging operation has been completed and forging movement of the roller stopped, the lever 13 will be moved rearwardly until the lever 17 engages the arm 28 of the bell crank 26. Upon further slight rearward movement of the hand lever13 the bit support 18 will be movedlaterally to permit the bit to fall through the open side of the slot 19 and opening 22 and to slide down the chute 23 on to the platform 29. During this period the member 16 is in the position shown in dotted linesat- A in Fig. 1. To restore the bit support 18 to its forging position by the spring 20 the hand lever 13 will be moved slightly forward to its full line position B. Another blank may now'be inserted in the slot 19 and upon forward movement of the lever 13 to feed this last blank the member 16 will engage the forged bit which has been discharged onto the platform 29 and move the same forwardly until it drops out of range of the member 16 onto the lower surface 31.

Sufficienttime will be consumed in the forging of the second bit blank to allow heat distribution from the shank portion of the bit resting on the platform to its bit portion, thereby raising thetemperature of the latter to one suitable for tempering purposes. l/Vhen the second blank is discharged from the bit support 18 onto the platform the arm 15 will again be in the dotted position A and upon forward movement thereof the blank will be moved against the first blank resting upon the lowersurface 31 to move the last blank therewith, this latter condition being due to the fact that the depth of the shoulder 3O between the surfaces 30 and 31 is less thanthe thickness of the bit. T 113 series of forging and discharging op erations is continued until the surface 30 will no longer receive another bit and accordingly when another bit is moved onto the surface 30 the first bit that was received thereon will be shoved off, there being preferably a suitable receptacle containing a tempering bath to receive the same. The length of time for heat distribution will be determined by the length of the surface 30 or by the length of time of contact between the bits and the element 16. The time of contact may be varied by use of the bolt andslot arrangement 33 although it will be clear that the length of the surface 30 may be varied by merely having a variable extension bolted onto the under side of the surface 30.

l/Vhile'I have in this application specifically described one form which my invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

7 WVhat I claim as new and desire to secure by Letters Patent is: I

LA forging machine comprising initial and final discharge mechanisms, one of which includes an element movable substantially continuously through a predetermined path,

and'meanswhereby the other mechanism is rendered operative only during a portion of sald movement through said path.

2. A forging machine comprising initial anism for discharging a work piece from the Hill machine after a forging operation, means for interrupting movement of said work piece after leaving said discharge mechanism, final discharge mechanism including an element which engages and positively moves said work piece to eject said work piece after its movement has been interrupted by said interrupting means, and a common manual actuating means for said mechanisms including a manually rotatable element common to both said mechanisms.

5. In a forging machine, a discharge mechanism for discharging a work piece from the machine after a forging operation, means for interrupting movement of said work piece after leaving said discharge mechanism, final discharge mechanism which ejects said work piece after its movement has been interrupted, and actuating means for both of said mechanisms including a common operating element, said first mechanism being operative to discharge a work piece when said elementis moved in one direction and said final mechanism being operative to eject a work piece during movement of said element in the opposite direction.

6. In a forging machine, a discharge mechanism for discharging a work piece from the machine after a forging operation, means for interrupting movement of said work piece after leaving said discharge mechanism, final discharge mechanism which ejects said work piece after its movement has been interrupt ed, and actuating means comprising pivoted member having an actuating arm for each of said mechanisms, said arms extending in opposite directions from the pivot.

In a forging machine having cooperating dies for forging a work piece, feeding mecha nism for feeding a work piece to forging position, means for discharging the work piece from said forging dies, means for delaying ejection of blanks from the machine after discharge from said dies, ejecting mechanism for ejecting the work pieces from the machine, and means for interconnecting said feed mechanism and said ejecting mechanism to make the operation of said ejecting mechanism dependent on operation of the feeding mechanism.

8. In a forging machine, cooperating dies for forging a work piece, feeding mechanism for feeding a work piece to the forging dies, means for discharging the work piece from said forging dies, means for timing ejection from the machine after discharge from said dies, and a common manual operating element for said feeding means and ejection timing mechanism.

9. In a forging machine having cooperating dies for forging a work piece, feeding mechanism for feeding a work piece to forging position, means for discharging the work piece from said forging dies, means for gathering a plurality of work pieces after discharge from said dies, and means for simultaneously moving a plurality of work pieces toward discharge position to discharge the same one at a time from the machine.

10. In a forging machine having cooperating dies for forging a work piece, means for discharging the work piece from said forging dies after a forging operation, a stop element for receiving the work piece after dischargeof said work piece from said dies for delaying ejection of said work pieces from the machine, and means for moving said work pieces along said stop element while said. work pieces are in contacting relation to eject the same at a predetermined time from the machine.

11. In a forging machine, cooperating dies for forging a work piece, discharge mechanism for discharging the work piece from said dies, a platform for receiving a plurality of said work pieces after discharge of said work pieces from said dies and for collecting and holding said work pieces, and ejecting mechanism for moving said work pieces along said platform and ejecting the same one at a time from the machine.

12. In a forging machine having cooperating dies for forging a work piece, discharge mechanism for discharging the work piece from said dies, means for delaying ejection of work pieces from the machine after discharge from said dies, ejecting mechanism for ejecting the work pieces from the machine, and means for adjusting said ejecting mechanism to vary the time between discharge from said dies and ejection from said machine.

13. In a forging machine having cooperating dies for forging a work piece, means for discharging the work pieces from said forging dies, a platform for stopping said work pieces after discharge from the dies, means for moving the work pieces along said platform to eject them from the machine including a movable element adapted to contact directly with the dies, and means for varying the period of contact of said element with the dies to adjust the time between discharge from the dies and ejection from the machine.

14. In a forging machine having cooperating dies for forging work pieces, means for discharging the work pieces from said dies, means for receiving a plurality of work pieces after a forging operation has been completedand the same have been discharged from said dies for delaying ejection of the work pieces from the machine, and means for gradually moving a plurality of. work pieces on said delaying means toward the point of final ejection from the machine.

15. In a forging machine having cooperating dies for forging a work piece, means for discharging the work piece from said forging dies by gravity after a forging operation, astop element for receiving the work piece after discharge from said dies and for delaying ejection of the work pieces from the machine, and means for moving said work pieces along said stop element while said work pieces are in contacting relation to eject the same at a predetermined time from the machine.

16. in a forging machine having cooperat- 7 ing dies for forging a work piece, means for discharging the work piece from said forgin dies by gravity after a forging operation including an inclined chute, a stop element for receiving the work piece after discharge from said dies and for delaying ejection of the work pieces from the machine, and means for moving said work pieces along said stop element while said work pieces'are in con tacting relation to eject the same at a predetermined time from the machine.

17. in a forging machine, cooperating dies for forging a work piece, discharge mechanism for discharging the work piece from said dies by gravity, a platform on which said work pieces drop after discharge from said dies for collecting and holding a plurality of said work pieces, and ejecting mechanism for moving said work pieces along said platform and ejecting the same one at a time from the machine.

18. In a forging machine, cooperating dies for forging a work piece, discharge mechanism for discharging the work piece from said dies by gravity including an inclined chute, a platform on which said work pieces :lrop after discharge from said dies for collecting and holding a plurality of said work pieces, and ejecting mechanism for moving said work pieces along said platform and ejecting the same one at atime from the machine.

19. In a forging machine having cooperatdies for forging work pieces, means for discharging the work pieces from said dies h gravity means on which said work pieces drop after a forging operation has been completed and said work pieces have been discharged from said dies for delaying ejection of the work pieces from the machine, and means for gradually moving a plurality of work pieces on said delaying means toward the point of final ejection from said machine.

20. In a forging machine having cooperating dies for forging work pieces, means for discharging the work pieces from said dies by gravity including an inclined chute, means on which said work pieces drop after a forging operation has been completed and said work pieces have been discharged from said dies for delaying ejection of the work pieces from the machine, and means for gradually moving a plurality of work pieces on said delaying means toward the point of final ejection from said machine.

In testimony whereof I affix my signature.

GEORGE F. MILLS. 

